Lactometer.



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WITNESSES.

m: norms Prrzns co mum-Lama. wwnmn'rcm Eatented Decemberl, 1903.

EDWARD O. REDFEARN, OF GALENA, ILLINOIS.

LACTOM ETER.

SPECIFICATION forming part of Letters Patent No. 745,521, dated December1, 1903. Application filed December 9, 1902. Serial No. 134,551. (Nomodel.)

of the upper edge of the socket the density To all whom it 12mgconcern.-

Be it known that I, EDWARD C. REDFEARN,

a citizen of the United States, residing at Galena, in the county of JoDaviess and State of Illinois, have invented certain new and usefulImprovements in Lactometers, of. which the following is a specification,reference beings.

My invention has for its object to provide for use with a can, cup, orsuch like kitchen utensil a device for determining by its density thequantity of milk contained in said receptacle. In addition to thisfeature the device is constructed so as to be detachably secured to thevessel in order that it may be quicklyand thoroughly cleaned. These endsare attained by the novel construction of parts and combinationsthereof, as hereinafter described, and illustrated in the accompanyingdrawings.

In the drawings, Figure 1 is a plan view of a milk-receptacle with myinvention applied thereto, and Fig. 2 is a vertical section taken online 2 2 of Fig. 1.

Referring to the drawings by letter, a represents a milk-receptacle,which in this instance is a cup provided with the usual handle b.

c is a cylindrical tube or socket made, preferably, of perforated sheetmetal open at both ends and provided with a resilient clip (1, which ishooked over the rim of the receptacle to detachably secure the socketagainst the inside of the receptacle, so that an indexmark or indent cof the socket will correspond with the surface of the milk, which isaccomplished by'simply moving the socket up or down until the said markcoincides with the said surface or by pouring in the milk until itreaches the indicated height on the socket previously attached.

Interior-1y of the socket isa hollow cylindrical float of less diameterthan the inside of the socket, in order that it may move freelytherethrough, and is integrally connected at its lower end to a weight wand at the opposite end to a stem 8. The former, w, is preferably ofconical shape and secured at its apex to the float, and the stem, whichis inscribed with graduate-marks g, extends axially of the float. Thesaid graduate-marks are disposed upon the stem in such positions as toindiate by their several heights'relative ing had therein to theaccompanying draw-- and very closely the quality of the milk sustainingthe float. For example, skimmed milk or milk which has been diluted withwater is of greater specific gravity, and consequently the float wouldnot be submerged as much and the stem project farther above the edge ofthe socket than where better milk, having its normal quantity of cream,was being tested.

If desired, the socket may be secured permanently to the utensil, thoughat a sacrifice of convenience of cleaning, but which in a measure may beovercome by making the several partsof aluminium or other non-corrosivematerial.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

1. The herein-described device, comprising a perforated cylindricalsocket open at both ends, an index-mark on the socket, a resilient hookintegral with said socket for detachably securing the same to a vessel,a cylindrical float of less diameter than the said socket, a stem havinggraduate-marks thereon extending axially from an end of said float, anda weight fixedly secured to the other end, substantially as and for thepurposes set forth.

2. In a device of the character described, the combination with avessel, of a cylindrical socket open at both ends, means for adjustablysecuring the same to said vessel, a cylindrical float having a stemextending axially therefrom, and a weight secured to the said float onthe end opposite said stem.

3. In a device of the character described,

a perforated cylindrical socket open at both ends, an index-markthereon, a hook integral with said socket and substantially thelengththereof for adjustably and detachably securing the socket to a vessel, acylindrical float slidably arranged within said socket, a stem havinggraduated marks thereon extending from the upper end of the float, andan integral weight on the opposite end of said float and of lessdiameter than said socket.

In testimony whereof I affix my signature in presence of two witnesses.

EDWARD C. REDFEARN.

Witnesses: 7'

- PIERRE BARNES, HENRY S. NooN.

